Development method and apparatus including toner pre-charging ca

Details Development method and apparatus including toner pre-charging ca Development method and apparatus including toner pre-charging ca

1992-11-20

1994-04-26

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118651, 118689, 355260, G03G 1500

Patent

active

053071247

ABSTRACT:
A reproduction apparatus is provided including a development apparatus having a capability for precharging replenishment toner particles being added to a triboelectric charging sump containing partially depleted two-component developer material. The precharging capability of the development apparatus is provided by an AC bias and a first DC bias connected to a first toner particle metering member. A second DC bias is connected to a second metering member. The precharging capability of the present invention is particularly useful during development of images requiring large amounts of toner particles.

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patent: 4437299 (1982-08-01), Ozawa et al.
patent: 4572102 (1986-02-01), Yuge et al.
patent: 4615606 (1986-10-01), Nishikawa
patent: 4924270 (1990-05-01), Sako et al.
patent: 5034775 (1991-07-01), Folkins
patent: 5079590 (1992-01-01), DeCecca
patent: 5095339 (1992-03-01), Terashima

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